9y+45=-y+135

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Solution for 9y+45=-y+135 equation: 



9y+45=-y+135

We move all terms to the left:

9y+45-(-y+135)=0

We add all the numbers together, and all the variables

9y-(-1y+135)+45=0

We get rid of parentheses

9y+1y-135+45=0

We add all the numbers together, and all the variables

10y-90=0

We move all terms containing y to the left, all other terms to the right

10y=90

y=90/10

y=9

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